/Engine/Source/Runtime/Core/Public/Containers/SparseArray.h
Allocated elements are overlapped with free element info in the element list.
template<typename ElementType> union TSparseArrayElementOrFreeListLink
TSparseArrayEle...
@319
ElementType
ElementData
If the element is allocated, its value is stored here.
int32
NextFreeIndex
If the element isn't allocated, this is a link to the next element in the array's free list.
int32
PrevFreeIndex
If the element isn't allocated, this is a link to the previous element in the array's free list.